中文摘要：

比较了法系大约克和台系杜洛克母猪5164窝次的繁殖性能，结果表明：大约克的分娩胎次、健仔数、死胎数、木乃伊数、产活仔数、死仔数、总产仔数、寄入仔猪数、寄出仔猪数、出生窝重、21日龄断奶公仔数、21日龄断奶母仔数、21日龄断奶总仔猪数、21日龄断奶窝重分别比杜洛克提高24．35％、14．55％、98．00％、50．00％、14．55％、94．74％、19．01％、116．67％、133．33％、12．22％、8．51％、17．73％、13．08％、12．46％，差异极显著；妊娠天数杜洛克比大约克提高0．20％，差异极显著；哺乳成活率杜洛克比大约克提高0．63％，差异显著。春、夏、秋、冬4个季节，大约克母猪群的健仔数、产活仔数、总产仔数、21日龄断奶总仔猪数、21日龄断奶窝重等均极显著高于杜洛克母猪。

英文摘要：

In this study, 5164 litters of reproductive performances of Yorkshire and Duroc sows were compared. The results showed that the delivery birth time, number of healthy piglets, number of dead fetuses, number of mummy, number of survival piglets, number of dead piglets, sum of born piglets, number of adopted piglets, number of sent piglets, litter weight of birth, number of male piglets weaned at 21 days, number of female piglets weaned at 21 days, sum of piglets weaned at 21 days, and 21 -day-old litter weight of Yorkshire sows were increased respectively by 24.35%, 14.55%, 98.00%, 50.00%, 14.55%, 94.74%, 19.01%, 116.67%, 133.33%, 12.22%, 8.51%, 17.73%, 13.08% and 12.46% as compared with those of Duroc sows, and the differences in these indexes between two kinds of sows were extreme significant （P〈0.01）. The fetation duration of Duroc sows was 0.20% lon- ger than that of Yorkshire sows （P〈0.01）. The survival rate of sucklings of Duroc sows was significantly （P〈0.05） increased by 0.63% as compared with that of Yorkshire sows. In spring, summer, autumn and winter, the number of healthy piglets, number of born survival piglets, sum of born piglets, sum of piglets weaned at 21 days, and 21-day-old litter weight of Yorkshire sow group were very significantly higher than those of Duroc sow group.